... with multiple colonies. These smaller nodules of coarse pearlite oppose more effectively to brittle crack propagation since colony boundaries function as an additional barrier. toughness carbon steel flanges carbon steel forgings Charpy normalizing heat treatment cooling rate Proceedings...

... Abstract This paper intends to contribute to a better understanding of how normalizing cooling rate affects toughness of SA – 350 LF2 Class 1 forgings. This is a sensitive material widely used in pressure vessels fabrication when toughness requirements are applicable. Three pieces from...

... Abstract Over the last decade, multiple carbon steel flanges brittle fracture failures have led the industry to issue a global alert on standard ASTM A105 flanges toughness values at temperatures higher than −20°F (−29°C), the minimum temperature allowed by the current editions of ASME B16.5...

... Abstract Medium and high-strength steels working in harsh environments are susceptible of suffering of mechanical properties loss due to hydrogen presence. In order to avoid catastrophic failures, the estimation of the fracture toughness in environment is necessary, but sometimes...

... to installation. Based on literature review the need for improvement in the approach for mechanical testing including fracture toughness testing for modern materials was identified. brittle fracture impact testing toughness carbon steel charpy grain size normalizing heat treatment LOW IMPACT TEST...

... application of 9Cr-1Mo-V steel is expected for reactors at petroleum refining plants. As materials applied to reactors, low-temperature toughness should be considered for weld joints in addition to creep strength. However, 9Cr-1Mo-V steel has poor low-temperature toughness compared to 2 1/4Cr-1Mo steel and 2...

... Abstract The objective of this paper is to use two-parameter fracture mechanics to adjust a material J-R resistance curve (i.e. toughness) from the test specimen geometry to the cracked component geometry. As most plant equipment is designed and operated on the “upper shelf”, a ductile tearing...

... matches with pipe. The fractotraph showed that these samples has adequate dimples in pars fibrosa, radiation area and shear zone, respectively, at −20°C. This indicates that when X100 pipe steels are reheattreated with this technique, it could gain right toughness. X100 pipeline steel reheat...